N-乙酰基靛蓝对CTAB临界胶束浓度的测定  

N-acetyl indigo for measuring CTAB's critical micelle concentration

作　　者：苗婷婷[1] 李平[1] 刘小芳[1] 倪翔[1] 林琳[1] 

机构地区：[1]天津理工大学化学化工学院,天津300384

出　　处：《天津理工大学学报》2011年第1期77-79,共3页Journal of Tianjin University of Technology

基　　金：国家自然科学基金(21071109)

摘　　要：本文以靛蓝为原料,在吡啶存在下与乙酰氯反应值得的N-乙酰基靛蓝是一种具有大斯托克斯位移值的近红外荧光化合物,以此为探针采用光谱法对阳离子表面活性剂十六烷基三甲基溴化铵(简称CTAB)的梯度浓度下的荧光光谱进行了测定,结果表明,在N-乙酰基靛蓝原发射峰位置发生了明显的荧光强度变化,在测试体系的荧光强度-浓度(I-C)图中有明显的突变点,此突变点对应的CTAB浓度值与其临界胶束浓度文献值0.80 mmol·L-1一致.In this paper,N-acetylindigo was synthesized using indigo,pyridine and acetyl chloride.It was a near-infrared fluorescent compound with large Stokes shift.Using spectral method cationic surfactant cetyltrimethylammonium bromide（referred to as CTAB） ＇s critical micelle concentration were studied.The results showed that the fluorescence intensity of N-acetyl indigo＇s original peak had undergone an obvious change.There was an obvious mutation in the fluorescence intensity-concentration diagram.The mutation ＇s concentration of CTAB was in accordance with the literature of the critical micelle concentration.

关 键 词：N-乙酰基靛蓝 十六烷基三甲基溴化铵 临界胶束浓度 荧光探针 

分 类 号：O657.3[理学—分析化学]